N3644 support for vector<bool> git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@187911 91177308-0d34-0410-b5e6-96231b3b80d8 
diff --git a/include/__bit_reference b/include/__bit_reference index 58d475e..857dd5a 100644 --- a/include/__bit_reference +++ b/include/__bit_reference 
@@ -1108,7 +1108,11 @@  unsigned __ctz_;    public: - _LIBCPP_INLINE_VISIBILITY __bit_iterator() _NOEXCEPT {} + _LIBCPP_INLINE_VISIBILITY __bit_iterator() _NOEXCEPT +#if _LIBCPP_STD_VER > 11 + : __seg_(nullptr), __ctz_(0) +#endif + {}    _LIBCPP_INLINE_VISIBILITY  __bit_iterator(const __bit_iterator<_Cp, false>& __it) _NOEXCEPT